I completed the swap out following these directions. I started my computer with the start up disk (the original system disk that came with my iBook) in the drive. I then needed to format the new hard drive, which I did using the disk utility program on the start up disk.
I didn't have a #8 Torx screwdriver so I used a pair of pliers to undo and the eventually to retighten the screws.
Tweezers were also helpful here.
I was able to use a hex wrench since I didn't have a #8 Torx screwdriver.